CVE-2006-4945 in DigitalWebShop
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in Cardway (aka Frederic Boudaud) DigitalWebShop 1.128 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the _PHPLIB[libdir] parameter to (1) rechnung.php or (2) prepend.php.
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Analysis
by VulDB Data Team • 07/21/2024
The vulnerability identified as CVE-2006-4945 represents a critical remote file inclusion flaw affecting the Cardway DigitalWebShop version 1.128 and earlier. This vulnerability resides within the application's parameter handling mechanisms, specifically targeting the _PHPLIB[libdir] parameter used in two key files: rechnung.php and prepend.php. The flaw enables malicious actors to inject and execute arbitrary PHP code remotely by manipulating the URL parameter, fundamentally compromising the application's security posture and potentially leading to complete system compromise.
This vulnerability maps directly to CWE-88, which describes the improper neutralization of special elements used in an expression, and more specifically to CWE-94, which addresses the execution of arbitrary code through the improper use of dynamic code generation. The root cause stems from the application's failure to properly validate and sanitize user input parameters before incorporating them into dynamic file inclusion operations. The software directly uses user-supplied input to construct file paths without adequate sanitization, creating a pathway for attackers to specify malicious URLs that get executed as PHP code.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the capability to gain unauthorized access to the affected system. Successful exploitation allows remote attackers to execute arbitrary commands with the privileges of the web server process, potentially leading to full system compromise, data exfiltration, or the establishment of persistent backdoors. The vulnerability affects the core functionality of the DigitalWebShop application, making it a prime target for attackers seeking to compromise e-commerce systems and potentially gain access to sensitive customer data or financial information.
Security mitigations for this vulnerability should focus on implementing proper input validation and sanitization mechanisms. The application must validate all user-supplied input parameters against a strict whitelist of allowed values and ensure that any dynamic file inclusion operations use absolute paths rather than user-controllable parameters. Organizations should implement proper parameter validation techniques, including the use of allowlists for file paths, disabling remote file inclusion features, and applying the principle of least privilege to web server processes. Additionally, regular security audits and input validation testing should be conducted to prevent similar vulnerabilities from emerging in future versions of the application. The vulnerability demonstrates the critical importance of secure coding practices and input validation in preventing remote code execution attacks, aligning with ATT&CK technique T1059.007 for execution through PHP and T1190 for exploitation of remote file inclusion vulnerabilities.